Part 1 - Introduction: Keys for success on the AP Environmental Science exam -- Basic science and math concepts -- Key terms. Part 2 - Life on Earth: Geology concepts -- Air and water -- Interactions of matter (soils and cycles) -- How life is organized -- You are what you eat (literally!) -- The only constant is change. Part 3 - How humans use and change Earth: Human population dynamics -- How we share Earth's natural resources -- Feeding Earth's people -- Providing for material needs: forestry and mining -- Managing our public and private lands -- Energy basics -- Nonrenewable energy resources -- Renewable and perpetual energy resources -- Environmental toxicology and pollution -- How human activities affect the atmosphere -- How human activities affect Earth's water -- Solid and hazardous waste -- Changes in Earth's climate -- Species extinction and loss of biodiversity. Part 4 - Tying it all together: Relating economics and environmental issues -- The most important environmental legislation. Part 5 - Test-taking strategies: Strategies for the multiple-choice questions -- Strategies for the free-response questions. Online practice exam.